An enclosure constructed of vinyl foam filled blow-molded panels. These panels are structured with tongue and groove connections built in to provide quick interlock one to another without the need for tools in assembly or disassembly. The construction characteristics provide panels that are rigid, strong, insulated, sound deadened with high flotation qualities. The enclosure is transportable by towing the assembled structure on a built-in sled bottom or dissembling the panels, stacking them and transporting them in a vehicle.